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composite intake 305? does it have a extended start or rough idle upon starting than cleans up? if so my money is on the fuel pressure regulator located under the intake.
put a fuel pressure tester on it, cycle key on for the pump to engage. turn key off. if pressure drops 5-10 psi in the first minute or so you have a bad fpr. costs about $200 for the fpr & gaskets if doing it yourself.
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